<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body{
            background-color: rgba(128, 255, 255, 0.8);
        }
        .box{
            width: 500px;
            height: 400px;
            margin: 100px auto;
            background-color: aliceblue;
            border-radius: 30px;
        }
        .box1{
            border: 1 px solid rgb(0, 0, 0);
            margin-top: 20px;
            text-align: center;
        }
        .box1 input{
            width: 300px;
            height: 30px;
            border: 2px solid gray;
            border-radius: 10px;
        }
        p {
            text-align: center;
            margin-top: 50px;
            font-size: 20px;
            font-weight: bolder;
        }
    </style>
</head>
<body>
    <form action="index.html">
        <div class="box">
            <p>投票系统</p>
                <div class="box1"><input type="text" placeholder="请输入用户名"><br></div>
                <div class="box1"><input type="password" placeholder="请输入密码"><br></div>
                <div class="box1"><input type="text" placeholder="请输入验证码"></div></div>
                <div class="box1"><input type="submit" value="登录"></input></div>
        </div>
    </form>
</body>
</html>